| 摘要 |
PROBLEM TO BE SOLVED: To provide an influence factor extraction method in which an explanatory variable having an effect on the unequal dispersibility of an objective variable can be extracted in both of qualitative and quantitative variables, and furthermore, the explanatory variable having strong correlation to the objective variable is extracted or the objective variable is estimated.SOLUTION: An influence factor extraction method is characterized by: selecting one explanatory variable from two or more explanatory variables; sorting the explanatory variables from a small one to a large one or from the large one to the small one along with corresponding objective variables, when the explanatory variable is the quantitative variable; dividing this into two or more sections; limiting one of the sections divided; calculating a cumulative distribution function α of F-distribution of all of the other sections and objective variables; calculating the above α of the objective variable by the combination of all the sections when the selected explanatory variable is a qualitative variable; performing the above processing about all other explanatory variables; and extracting the explanatory variable having an effect on the unequal dispersibility based on all α values. |
